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It's not just the nominees who will be battling it out at tonight’s glamorous Oscars ceremony in Los Angeles.Behind the scenes at the Kodak Theatre, a war has been waging between two of the world’s biggest stars, Sir Elton John and Madonna, who are throwing rival post-Oscar parties at the same time, two miles from each other in Hollywood.In a battle of A-list egos, the feuding stars have spent the days leading up to the 84th Academy Awards ceremony trying to outshine one another in a desperate attempt to host the best Oscars party in town.

But Madonna, who is engaged in a long-running spat with Sir Elton, is determined to upstage his dinner. The 53-year-old has poached Sir Elton’s favourite LA florist, Eric Butterbaugh, and has promised guests she will sing live at her party.

The singer, whose film W.E. has been nominated in the Oscar’s costume design category, has apparently even phoned Penelope Cruz, Bradley Cooper and Cameron Diaz to personally invite them to the party, which she usually co-hosts with Demi Moore, who is recovering from a breakdown.